package xyz.syyrjx.blog.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {
    public static String code(String str){
        try{
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte[] byteDigest = md.digest();
            int i = 0;
            StringBuffer buffer = new StringBuffer("");
            for(int offset = 0; offset < byteDigest.length ; offset++){
                i = byteDigest[offset];
                if(i < 0) {
                    i += 256;
                }
                if(i < 16){
                    buffer.append("0");
                }
                buffer.append(Integer.toHexString(i));
            }
            //32位加密
            return buffer.toString();
            //16位加密
            //return buffer.toString().substring(8,24);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }

}
